/*
 * Copyright (c) 2022-2022 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2022-2022 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 * of conditions and the following disclaimer in the documentation and/or other materials
 * provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 * to endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#include "It_posix_container.h"
#include <arpa/inet.h>
#include <net/if.h>

using namespace std;
#define STACK_SIZE (1024 * 1024)    /* Stack size for cloned child */
#define CHILD_FUNC_ARG (0x2088)

static int GetLocalIP(char *ip) {
    int inet_sock;
    struct ifreq ifr;
    inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
    strcpy(ifr.ifr_name, "eth0");
    ioctl(inet_sock, SIOCGIFADDR, &ifr);
    strcpy(ip, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));

    (void)close(inet_sock);
    return 0;
}

static int SetIP(char *ip) {
    struct ifreq ifr;
    int fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
    strncpy(ifr.ifr_name, "eth0", IFNAMSIZ);
    ifr.ifr_addr.sa_family = AF_INET;
    inet_pton(AF_INET, ip, ifr.ifr_addr.sa_data + 2);
    ioctl(fd, SIOCSIFADDR, &ifr);
    (void)close(fd);
    return 0;
}

static int childFunc(void *arg) {
    int ret;

    char oldIp[16] = {NULL};
    char newIp[16] = {NULL};

    ret = GetLocalIP(oldIp);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = unshare(CLONE_NEWNET);
    ICUNIT_ASSERT_NOT_EQUAL(ret, -1, ret);

    ret = SetIP("192.168.1.234");
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = GetLocalIP(newIp);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = strcmp(oldIp, newIp);
    ICUNIT_ASSERT_NOT_EQUAL(ret, 0, ret);

    return 0;
}

static UINT32 TestCase(VOID)
{
    int ret;
    char oldIp[16] = {NULL};
    char newIp[16] = {NULL};
    char *stack;
    char *stackTop;
    stack = (char*)mmap(NULL, STACK_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_STACK, -1, 0);
    stackTop = stack + STACK_SIZE;

    ret = GetLocalIP(oldIp);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    int arg = CHILD_FUNC_ARG;
    auto pid = clone(childFunc, stackTop, SIGCHLD, &arg);

    int status;
    ret = waitpid(pid, &status, 0);
    ICUNIT_ASSERT_EQUAL(ret, pid, ret);

    int exitCode = WEXITSTATUS(status);
    ICUNIT_ASSERT_EQUAL(exitCode, 0, exitCode);

    ret = GetLocalIP(newIp);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    ret = strcmp(oldIp, newIp);
    ICUNIT_ASSERT_EQUAL(ret, 0, ret);

    return 0;
}


VOID ItPosixContainerNet002(void)
{
    TEST_ADD_CASE("IT_POSIX_CONTAINER_NET_002", TestCase, TEST_POSIX, TEST_CONTAINER, TEST_LEVEL0, TEST_FUNCTION);
}

